ABAP Select data from SAP table PESREDDAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PESREDDAT table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to PESREDDAT. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the PESREDDAT table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_PESREDDAT TYPE STANDARD TABLE OF PESREDDAT,
      WA_PESREDDAT TYPE PESREDDAT,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <PESREDDAT> TYPE PESREDDAT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PESREDDAT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PESREDDAT
  INTO TABLE IT_PESREDDAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PESREDDAT
*  INTO TABLE @DATA(IT_PESREDDAT2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_PESREDDAT INDEX 1 INTO DATA(WA_PESREDDAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PESREDDAT ASSIGNING <PESREDDAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PESREDDAT>-CABECERA = 1.
<PESREDDAT>-INDICADOR = 1.
<PESREDDAT>-MES = 1.
<PESREDDAT>-HUELGA = 1.
<PESREDDAT>-PLURIEMP = 1.

ENDLOOP.

LOOP AT IT_PESREDDAT INTO WA_PESREDDAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PESREDDAT-REDUCCION, sy-vline,
  WA_PESREDDAT-MODALIDAD, sy-vline,
  WA_PESREDDAT-ALTA_SIN, sy-vline,
  WA_PESREDDAT-LIBRE_1, sy-vline,
  WA_PESREDDAT-LIBRE_2, sy-vline,
  WA_PESREDDAT-COT_ENTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PESREDDAT you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_PESREDDAT TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_PESREDDAT INTO WA_PESREDDAT.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PESREDDAT_STR, 
CABECERA TYPE STRING,
INDICADOR TYPE STRING,
MES TYPE STRING,
HUELGA TYPE STRING,
PLURIEMP TYPE STRING,
REDUCCION TYPE STRING,
MODALIDAD TYPE STRING,
ALTA_SIN TYPE STRING,
LIBRE_1 TYPE STRING,
LIBRE_2 TYPE STRING,
COT_ENTER TYPE STRING,
DIALT TYPE STRING,
COT_INDIC TYPE STRING,
INDVA TYPE STRING,
CLAVE TYPE STRING,
ESPECIF TYPE STRING,
RESERV_2 TYPE STRING,
BONIR TYPE STRING,
GRUPO TYPE STRING,
JUBILACION TYPE STRING,
RESERV_3 TYPE STRING,
TPORIG TYPE STRING,
CONTRATO TYPE STRING,
EPIGRAFE TYPE STRING,
EPIGR114 TYPE STRING,
OCUPA TYPE STRING,
RESERV_1 TYPE STRING,
INDIS TYPE STRING,
RELAB TYPE STRING,
COLIN TYPE STRING,
ICOMP TYPE STRING,
RESERVADO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PESREDDAT_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_PESREDDAT_STR-CABECERA sy-vline 
WA_PESREDDAT_STR-INDICADOR sy-vline 
WA_PESREDDAT_STR-MES sy-vline 
WA_PESREDDAT_STR-HUELGA sy-vline 
WA_PESREDDAT_STR-PLURIEMP sy-vline 
WA_PESREDDAT_STR-REDUCCION sy-vline 
WA_PESREDDAT_STR-MODALIDAD sy-vline 
WA_PESREDDAT_STR-ALTA_SIN sy-vline 
WA_PESREDDAT_STR-LIBRE_1 sy-vline 
WA_PESREDDAT_STR-LIBRE_2 sy-vline 
WA_PESREDDAT_STR-COT_ENTER sy-vline 
WA_PESREDDAT_STR-DIALT sy-vline 
WA_PESREDDAT_STR-COT_INDIC sy-vline 
WA_PESREDDAT_STR-INDVA sy-vline 
WA_PESREDDAT_STR-CLAVE sy-vline 
WA_PESREDDAT_STR-ESPECIF sy-vline 
WA_PESREDDAT_STR-RESERV_2 sy-vline 
WA_PESREDDAT_STR-BONIR sy-vline 
WA_PESREDDAT_STR-GRUPO sy-vline 
WA_PESREDDAT_STR-JUBILACION sy-vline 
WA_PESREDDAT_STR-RESERV_3 sy-vline 
WA_PESREDDAT_STR-TPORIG sy-vline 
WA_PESREDDAT_STR-CONTRATO sy-vline 
WA_PESREDDAT_STR-EPIGRAFE sy-vline 
WA_PESREDDAT_STR-EPIGR114 sy-vline 
WA_PESREDDAT_STR-OCUPA sy-vline 
WA_PESREDDAT_STR-RESERV_1 sy-vline 
WA_PESREDDAT_STR-INDIS sy-vline 
WA_PESREDDAT_STR-RELAB sy-vline 
WA_PESREDDAT_STR-COLIN sy-vline 
WA_PESREDDAT_STR-ICOMP sy-vline 
WA_PESREDDAT_STR-RESERVADO sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.